Home / 27,890.60-38,489.08-15,143.80

Finding the Fourth Proportional to 27,890.60, 38,489.08 and 15,143.80

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Solution

The fourth proportional to 27,890.60, 38,489.08 and 15,143.80 is: 20,898.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.60 : 38,489.08 = 15,143.80 : x
  2. Step 2: Convert to fraction form
    27,890.60/38,489.08 = 15,143.80/x
  3. Step 3: Cross multiply
    27,890.60x = 38,489.08 × 15,143.80
  4. Step 4: Simplify right side
    27,890.60x = 582,870,929.70
  5. Step 5: Solve for x
    x = 582,870,929.70/27,890.60
  6. Step 6: Final answer
    x = 20,898.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.